USAP Grounding Zone (ACT) site lat/lon = (-84.3380,-163.5425) cell lat/lon = (-84.3284,-163.5930) Forecast initialized at 2025-12-21/00 UTC MPAS cell scale: 2.4 km FCST UTC UTC T Td Altim Spd Gust Dir Grid VVV RH1RH2RH3 T1T2T3 ACCUM HR DAY HR (C) (C) (in Hg)(kts)(kts)(deg)(deg) (*) (% wrt water) (C) (*) 0 21 00 -8.9 -12.4 29.30 2 3 325 161 000 66 42 39 -9 -9 -9 000 1 21 01 -8.6 -12.4 29.31 0 4 69 265 000 77 49 39 -9 -9-10 000 2 21 02 -8.4 -12.0 29.33 1 5 58 254 -001 79 51 36 -9 -9-10 000 3 21 03 -8.4 -11.2 29.31 2 5 54 251 000 82 51 36 -9 -9-10 000 4 21 04 -8.7 -11.0 29.32 3 5 59 256 000 86 49 37 -9 -9-10 000 5 21 05 -9.2 -11.2 29.34 3 5 47 244 000 89 50 39 -9 -9-10 000 6 21 06 -9.8 -11.7 29.34 3 6 33 229 000 91 49 39 -9 -9-10 000 7 21 07 -10.3 -12.2 29.33 3 5 19 215 000 93 49 40 -9 -9-10 000 8 21 08 -10.8 -12.4 29.33 2 5 18 214 000 96 48 40 -9 -9-10 000 9 21 09 -11.6 -13.3 29.32 3 5 17 214 000 96 51 42 -9-10-10 000 10 21 10 -11.9 -14.2 29.34 3 4 17 214 000 91 53 42 -9-10-10 000 11 21 11 -12.3 -14.7 29.33 2 3 15 212 000 91 54 42 -9-10-10 000 12 21 12 -12.8 -14.9 29.33 2 2 17 213 000 94 54 43 -9-10-10 000 13 21 13 -13.2 -14.7 29.32 2 2 55 252 000 100 57 45 -9-10-10 000 14 21 14 -14.8 -15.0 29.34 4 5 106 303 000 115 62 44 -10-10-10 000 15 21 15 -15.0 -15.5 29.35 3 7 100 296 000 113 70 41 -10-10-11 000 16 21 16 -14.3 -15.3 29.35 2 5 98 295 000 106 64 42 -10-10-11 000 17 21 17 -13.7 -15.3 29.35 1 3 94 290 000 100 58 42 -10-10-11 000 18 21 18 -13.4 -14.8 29.34 1 1 136 332 000 101 54 41 -9-10-11 000 19 21 19 -12.7 -14.2 29.34 2 3 128 324 000 100 52 41 -9-10-11 000 20 21 20 -11.9 -13.6 29.34 1 1 119 316 001 96 53 43 -9-10-10 000 21 21 21 -11.3 -13.1 29.34 1 1 103 299 000 96 53 41 -9-10-11 000 22 21 22 -10.8 -12.9 29.34 1 1 138 334 000 94 52 44 -10-10-10 000 23 21 23 -10.5 -12.6 29.32 1 1 111 308 001 93 50 42 -10-10-10 000 24 22 00 -10.2 -12.4 29.32 1 1 101 298 001 92 49 40 -10-10-10 000 25 22 01 -9.9 -12.2 29.32 1 1 69 265 000 91 46 41 -10-10-10 000 26 22 02 -9.7 -11.9 29.32 1 1 53 249 001 91 43 41 -10 -9-10 000 27 22 03 -9.6 -11.7 29.32 1 1 41 238 001 92 41 42 -10 -9-10 000 28 22 04 -9.7 -11.4 29.31 2 3 22 219 001 93 40 41 -10 -9-10 000 29 22 05 -10.1 -11.6 29.30 3 3 17 213 000 96 43 41 -10-10-10 000 30 22 06 -10.4 -11.7 29.30 3 4 15 212 001 99 42 40 -10-10-10 000 31 22 07 -11.0 -12.7 29.30 3 3 4 201 000 96 42 40 -10-10-10 000 32 22 08 -11.6 -12.7 29.30 3 3 13 209 000 103 43 40 -10-10-10 000 33 22 09 -11.9 -12.8 29.30 2 2 6 203 000 104 40 41 -10-10-10 000 34 22 10 -13.0 -13.4 29.29 3 3 40 236 000 111 44 41 -10-10-10 000 35 22 11 -14.0 -14.6 29.30 3 3 56 252 001 114 53 41 -10-10-10 000 36 22 12 -16.0 -16.1 29.30 1 2 101 297 000 116 52 40 -10-10-10 000 37 22 13 -16.8 -17.0 29.31 2 2 113 310 001 117 58 41 -11-11-11 000 38 22 14 -16.4 -16.6 29.31 3 4 130 327 000 117 65 41 -11-11-11 000 39 22 15 -15.8 -15.9 29.31 2 4 126 323 000 116 64 40 -11-11-11 000 40 22 16 -14.9 -15.1 29.30 2 2 178 14 000 115 54 40 -10-11-11 000 41 22 17 -13.7 -13.8 29.30 5 5 134 330 001 114 62 38 -12-11-11 000 42 22 18 -12.6 -12.7 29.31 6 6 127 324 001 113 87 34 -14-12-12 000 43 22 19 -12.0 -12.2 29.30 3 4 159 356 -003 111 80 36 -13-12-13 000 44 22 20 -11.8 -11.9 29.30 4 4 150 347 000 112 86 40 -13-12-12 000 45 22 21 -11.5 -11.5 29.30 4 4 147 344 001 112104 45 -13-13-11 000 46 22 22 -11.2 -11.3 29.30 3 3 130 326 000 111 98 49 -12-13-12 000 47 22 23 -11.0 -11.4 29.30 3 3 118 314 -002 107 86 42 -12-12-12 000 48 23 00 -10.9 -11.6 29.30 2 3 119 315 001 104 70 40 -12-12-12 000 49 23 01 -10.5 -12.2 29.30 1 2 136 333 004 97 65 45 -12-11-12 000 50 23 02 -10.4 -12.1 29.29 1 2 138 335 000 96 63 52 -11-11-11 000 51 23 03 -10.2 -12.0 29.30 1 2 183 19 000 95 62 50 -11-11-11 000 52 23 04 -10.2 -12.0 29.30 1 1 214 51 002 94 60 48 -11-11-11 000 53 23 05 -10.4 -12.0 29.29 2 2 247 83 000 95 57 42 -11-11-10 000 54 23 06 -10.9 -12.3 29.28 3 3 273 110 000 98 52 40 -11-10-10 000 55 23 07 -11.4 -12.3 29.27 4 5 255 92 001 105 48 37 -11-10-10 000 56 23 08 -12.0 -12.6 29.28 3 5 241 78 000 110 48 37 -11-10-10 000 57 23 09 -12.5 -12.9 29.28 4 6 246 82 000 112 51 40 -11-10 -9 000 58 23 10 -13.8 -14.0 29.28 3 7 271 107 000 114 46 41 -10 -9 -9 000 59 23 11 -14.8 -14.9 29.27 3 7 308 144 000 115 38 37 -10 -8 -8 000 60 23 12 -14.4 -14.6 29.26 6 8 276 112 000 115 31 33 -9 -6 -7 000 61 23 13 -14.0 -14.2 29.26 7 11 243 79 000 114 29 32 -8 -6 -7 000 62 23 14 -13.7 -13.9 29.26 7 15 225 62 000 114 40 38 -8 -7 -7 000 63 23 15 -13.0 -13.6 29.25 3 7 190 26 004 110 53 41 -8 -8 -7 000 64 23 16 -12.6 -13.6 29.25 4 11 182 18 000 105 47 36 -9 -8 -7 000 65 23 17 -12.0 -13.5 29.25 6 19 116 312 -001 100 46 51 -7 -7 -8 000 66 23 18 -11.2 -13.3 29.25 5 20 145 342 -006 92 58 61 -9 -8 -8 000 67 23 19 -10.4 -12.9 29.26 7 15 123 320 -001 88 67 55 -10-10 -9 000 68 23 20 -11.1 -12.8 29.27 8 12 111 308 001 96 63 37 -11-10-11 000 69 23 21 -10.4 -13.0 29.29 9 15 122 318 000 88 71 35 -11-11-11 000 70 23 22 -9.8 -12.7 29.29 9 17 139 335 -001 84 54 32 -10-10-10 000 71 23 23 -9.1 -12.4 29.30 10 19 137 333 -001 80 45 35 -9 -9-10 000 72 24 00 -8.5 -12.2 29.30 10 20 136 332 000 76 38 35 -8 -8 -9 000 73 24 01 -8.0 -11.9 29.30 8 18 144 340 -007 74 34 41 -7 -8 -9 000 74 24 02 -6.5 -11.6 29.29 9 21 137 333 -004 64 36 65 -7 -7 -7 000 75 24 03 -4.9 -7.6 29.28 8 24 140 336 001 81 72 71 -5 -5 -6 000 76 24 04 -3.6 -6.6 29.27 20 30 143 339 -004 78 70 63 -4 -5 -5 000 77 24 05 -3.9 -7.0 29.27 21 33 141 338 -006 78 69 60 -4 -5 -5 000 78 24 06 -4.2 -7.3 29.28 22 36 138 335 000 78 65 56 -4 -4 -4 000 79 24 07 -4.4 -7.5 29.29 23 38 136 333 -003 78 65 56 -4 -4 -4 000 80 24 08 -4.8 -8.1 29.31 24 40 137 334 001 77 66 57 -5 -5 -4 000 81 24 09 -5.0 -8.8 29.32 26 43 133 330 -003 73 62 54 -5 -5 -4 000 82 24 10 -5.0 -9.4 29.34 26 44 131 327 000 69 55 51 -4 -5 -5 000 83 24 11 -5.0 -9.7 29.35 24 43 132 329 002 67 51 45 -4 -5 -5 000 84 24 12 -5.2 -10.1 29.36 22 42 134 331 -003 66 43 41 -4 -5 -5 000 85 24 13 -5.4 -10.2 29.36 22 42 134 330 005 66 35 36 -3 -4 -5 000 86 24 14 -5.5 -10.2 29.36 20 39 134 330 -002 67 33 32 -3 -4 -5 000 87 24 15 -5.6 -10.2 29.36 19 38 135 331 -004 68 33 32 -3 -4 -6 000 88 24 16 -5.4 -10.4 29.36 19 37 132 329 011 65 33 32 -4 -4 -6 000 89 24 17 -5.6 -9.8 29.36 18 36 140 336 005 70 38 35 -4 -5 -6 000 90 24 18 -5.3 -9.6 29.36 18 36 136 332 005 69 42 37 -4 -5 -6 000 91 24 19 -4.9 -9.8 29.35 20 36 131 328 002 65 44 36 -4 -5 -6 000 92 24 20 -4.8 -9.4 29.35 18 34 132 329 000 67 48 35 -4 -6 -6 000 93 24 21 -4.4 -9.1 29.35 18 33 131 328 002 66 47 33 -4 -5 -6 000 94 24 22 -4.2 -8.8 29.35 18 33 131 327 000 67 49 30 -4 -5 -6 000 95 24 23 -4.1 -8.5 29.35 17 31 129 325 000 69 51 29 -4 -5 -5 000 96 25 00 -4.1 -8.2 29.34 16 29 129 326 000 71 54 28 -4 -5 -5 000 97 25 01 -4.3 -8.0 29.33 16 27 130 326 -001 74 49 31 -4 -5 -5 000 98 25 02 -4.5 -7.8 29.33 15 25 130 326 -004 76 50 37 -5 -5 -5 000 99 25 03 -4.6 -7.6 29.32 13 23 128 325 -004 78 47 39 -5 -5 -4 000 100 25 04 -4.8 -7.7 29.32 11 21 127 324 -002 80 41 32 -4 -4 -4 000 101 25 05 -5.2 -7.8 29.31 10 19 130 326 -004 82 39 27 -4 -4 -4 000 102 25 06 -5.7 -8.1 29.31 9 19 136 333 -003 84 38 27 -4 -4 -4 000 103 25 07 -6.3 -8.5 29.31 8 17 142 339 002 86 38 28 -4 -4 -4 000 104 25 08 -7.2 -9.2 29.31 7 14 155 351 001 88 30 22 -4 -3 -3 000 105 25 09 -7.8 -9.7 29.31 8 14 163 359 004 90 37 15 -4 -4 -4 000 106 25 10 -8.3 -10.1 29.31 7 15 150 346 004 91 40 16 -4 -4 -4 000 107 25 11 -8.8 -10.6 29.31 7 15 153 350 003 92 39 16 -4 -4 -4 000 108 25 12 -9.4 -11.0 29.31 6 14 153 350 001 94 32 18 -4 -3 -4 000 109 25 13 -9.6 -11.2 29.31 7 13 169 6 003 94 32 17 -4 -3 -4 000 110 25 14 -9.3 -11.2 29.31 7 17 155 351 001 91 37 17 -5 -4 -4 000 111 25 15 -9.2 -11.4 29.31 7 17 154 351 002 88 36 15 -5 -3 -4 000 112 25 16 -8.9 -11.2 29.31 7 16 161 357 004 88 33 14 -5 -3 -4 000 113 25 17 -8.1 -10.6 29.31 9 18 158 354 000 85 38 15 -6 -4 -5 000 114 25 18 -7.4 -10.1 29.31 10 21 144 340 000 83 39 14 -7 -5 -4 000 115 25 19 -6.7 -9.8 29.31 11 24 130 327 000 79 37 17 -6 -4 -4 000 116 25 20 -6.1 -9.3 29.31 11 22 134 331 000 78 35 17 -6 -4 -4 000 117 25 21 -5.8 -8.9 29.31 10 24 132 329 005 79 27 17 -5 -3 -4 000 118 25 22 -5.5 -8.5 29.32 12 23 137 333 003 79 44 15 -6 -5 -4 000 119 25 23 -5.0 -8.1 29.32 13 25 131 327 003 78 47 28 -5 -5 -4 000 120 26 00 -4.8 -8.0 29.32 14 27 124 320 004 78 34 33 -5 -3 -4 000 * NOTES on units: VVV (vertical velocity) is given as tenths of a microbar per second at 700 hPa, with positive values indicating upward motion; ACCUM (accumulated precipitation, past 3h) is given as hundredths of a millimeter; RH1, RH2, and RH3 are the % RH at the surface, 1000', and 3000', respectively; T1, T2, and T3 are the temperatures at 500', 1000', and 1500', respectively. Gust is estimated according to the NCEP HRRR gust algorithm.